'97 Camry won't start

Hello. A week ago my car started really
rough before running normally throughout
the day. It did tgis every morning. My battery
then went out...and I got a new one installed.
Right after replacing battery...car started
fine...as expected...since the rough start
only happens in the morning.
Yesterday...same rough start...then runs fine
throughout tge day. Today, the car had the
same rough start but wouldn't stay on... It
will crank as usual...just not turning over.
There's no check engine light on, so can't
check codes. Any idea what it could be? I
went and git gas to put in it...thinking that
my gas gauge was broken and car needed
gas....no luck.  Please help. Other tgan tge
battery and this recent issue...the car runs
great and smoothly.